Sleutel voor Rosaceae-pollen (Reitsma) [te verifiëren]

Tabel-overzicht

Brontekst

Key to the types 1 a Pollen grain with striae 2 b Pollen grain without striae, that is psilate, echinate, scabrate, or only with phase contrast microscope striate 7 2 a Pollen grain operculate 3 b Pollen grain not operculate 4 3 a Pollen grain without costae colpi Potcntilla type b Pollen grain with costae colpi Rosa gallica type 4a Striae indistinct, intrastriate 5 b Striae distinct, extrastriate 6 5 a Pollen grain with costae colpi Rubus idaeus type b Pollen grain without costae colpi Crataegus type 6 a Pollen grain with tectum Geum type b Pollen grain with tectum perforatum Mespilus type 7 a Pollen grain without structural elements on tectum 8 b Pollen grains with structural elements on tectum 12 8 a Pollen grain operculate 9 b Pollen grain not operculate 10 9 a C.I. > 4, pollen grain with costae colpi Rosa canina type b C.I. < 3, pollen grain without costae colpi Sanguisorba type 10 a C.I. < 3, columellae in intercolpium higher than those at the poles Alchemilla type b C.I. > 4, columellae in intercolpium as high as those at the poles 11

11a Pollen grain with costae colpi Rubus idaeus type b Pollen grain without costae colpi Crataegus type 12 a Structural elements small: scabrae; endocolpus . . . Filipendula type b Structural elements large: echinae, gemmae, or verrucae; endoporus Rubus chamaemorus type

Key to the subtypes Rubus idaeus type 1 a Pollen grain with costae endocolpi Rosa rubiginosa subtype 1 b Pollen grain without costae endocolpi Rubus idaeus subtype

Potentilla type (Faegri and Iversen, 1964) Key to the subtypes 1 a Tectum at the pole and in the intercolpium of uniform breadth ... 2 b Tectum at the pole twice as broad as in the intercolpium Potentilla sterilis subtype 2 a Striae anastomosing Fragaria vesca subtype b Striae not anastomosing 3 3 a Operculum protruding from the fastigium Comarum palustre subtype b Operculum not protruding from the fastigium Potentilla anserina subtype

Fragaria vesca subtype Key to the species 1 a Longest axis 18-25 endocolpus; m : e = 0.2-0.4 2 b Longest axis 25-31 ft; endoporus; m : e = 0.5-0.75 3 2 a Pol. view: interhexagonal Fragaria vesca b Pol. view: circular Potentilla reptans 3 a Pol. view: subangular Fragaria moschata b Pol. view: circular Potentilla tabernaemontan

Geum type Costae endocolpi present Geum subtype Costae endocolpi not present Dryas subtype

Geum subtype Key to the genera and species 1 a longest axis 22-33 n b longest axis 35-60 (i 2 a longest axis 22-28 p’,mi 3-3.5 Geum urbanum b longest axis 28-33 \x m: 2.2-2.8 fx Geum rivale 3 a longest axis 35-50 fi\ thickness exine 2.8 /x . . . Agrimonia eupatoria b longest axis 50-60 p; thickness exine 3.5 /t .... Agrimonia odorata

Alchemilla type Key to the subtypes Pollen grain with costae colpi; colpus membrane nudate Alchemiila subtype Pollen grain without costae colpi; colpus membrane granulate Aphanes subtype

Sanguisorba type Key to the subtypes 1 a Maximum width of the colpus < maximum width of the intercolpium at equatorial view; pollen grain oblate spheroidal Sanguisorba minor subtype